Google has released a new version of Sketchup, adding a few effects/features (see new feature list). Sketchup is a great 3D modelling tool even before Google bought it last year. In typical google fashion, it bought this commerical tool and made it FREE. I have been using to build some sample models, and even some storyboards (for short films).
A self explanatory video:
I am impressed with this website, rattling I am a big fan.